b) Shape the front and top of the fin as desired.
c) Use Goop (or Shoe Goo) to glue the fins to the ends of the wings, with the slit just above the top of the wing.
d) Place a 2” (5cm) wide strip of Extreme Tape along the entire bottom of the fin, wrapping around to the bottom of the wing.
Allow the glue to dry.
e) Cut a 1” (2.5cm) wide strip of Extreme Tape and feed it through the slit in the fin, so that the tape attaches to both the top
and bottom of the wing, around the bottom portion of the fin.
Center of Gravity is important
a) With the motor and fins in place set all the electronics you plan to use on the top of the wing and see how it balances.
b) Move the parts around if needed to get the plane balanced.
c) Mark the location of the components.
d) Increasing battery size is a better choice than adding lead but sometimes a little lead in the nose is the best option if you
don't have the right battery or you don't have enough room for a bigger battery.
e) With the center spar on the CG, anything ahead of the spar will move the CG forward and anything behind the CG will move
it back.
f) Most flying wings tend to be tail heavy so you usually can be generous with your battery size to help balance the wing.
g) The CG is close to 23% of total wing area including elevons. This means 77% of the wing and the motor are behind the CG.
Installing the electronics.
a) Pre- test the motor, batteries, ESCS, receivers and servos that you plan to install to know everything is working.
b) Look at the length of the wires between the battery and ESC and the ESC and the receiver. This often will influence where
you will install the radio.
c) Spread your servos wide enough apart so that the servo arms will have a good angle to the horns on the elevons. The
servos will need to be 12"-20" apart. Make sure the servo electrical wires will reach before you cut your holes. (You may
need to use a servo extension or two depending on your servos.)
d) Move the battery forward or back to get the CG at 9" back.
e) Install the servos.
f) The radio slot can be cut deep and wide enough to allow you to put the ESC and receiver on their side in the slot or you can
cut separate compartments for the battery, ESC and receiver and connect them with razor blade slits for the wires to be
pressed into the foam. Put clear shipping tape or laminate over any slit or slot with wires.
g) The wing is stronger if you don't leave any empty space in the wing so cut out compartments that fit parts tightly.
h) Once all components are installed hot glue the servos securely in place with only glue around the sides and not under the
servo so you can remove it later if needed without damaging the plane.
i) You can use Velcro straps to secure the battery, ESC and receiver as needed. In some cases I have used clear tape to secure
the radio but make sure the ESC has adequate ventilation so it doesn't overheat.
j) Secure all parts so they can't fall out or get knocked out in an accident.
After determining best location draw cut outs on wing. Use soldering iron or razor blade to cut out foam.
